sfHover = function() 
{
var sfEls = document.getElementById("topmenu").getElementsByTagName("li");
for (var i=0; i<sfEls.length; i++) {
	sfEls[i].onmouseover=function() {
		this.className+="sfhover";
	}
	sfEls[i].onmouseout=function() {
		this.className=this.className.replace(new RegExp("sfhover\\b"), "");
	}
}
}